The worst feeling in the world is what you feel when you listen to someone you love screaming in a hospital room, but not be allowed to visit them because you are not family. I've only experienced this once thanks be to Heaven.

For me, the worst feeling in the world is trying to please everyone when you actually cannot. There are many people who have done it and only made themselves worst and they dug a deeper darkness in their hearts. To make people be pleased with you is impossible because its subjective and it is based on their preferences therefore you cannot actually make someone like you the way you want it too, and when you realized that you failed in that situation, then you'll have the worst feeling in the world. That's for me :)

Worst for me is the feeling that self-doubt gives. it will immediately lead you to self sabotage and depression. it s not too hard to deal with at first but if it takes long enough for you to get over it gets harder and harder til you re in over your head.